Sharepoint AD security group, email address, sending alerts

I am running Sharepoint 2010.

I have a mail enabled security group. When I send an alert to this group I get an error saying that the group does not have an email addess.

I can send to the groups email address in outlook fine and it shows up in the GAL.

If I go into Sharepoint security and I manually edit the group. I can add in an email address for the group. If I enter in the email address maunally I can send alerts to the group.

Is this correct? Shouldn't Sharepoint read the groups email address directly from AD when I add in the group to the security list on the site?

Thank you for your help
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Check the properties on the group under message delivery restrictions.  Accept messages from all senders.  uncheck require that all senders are authenticated
sorry for the confusion i didn't read the full question.
Try this

Give everyone view acces to the group.

Add read permissions for the Sharepoint group to the site.
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mmcodefiveAuthor Commented:
What do you mean read access in the group? Sharepoint reads the group from AD correctly and I have the group to have read permissions on the site. Am I missing something?
mmcodefiveAuthor Commented:
I havent made any changes and go figure Sharepoint is reading the email address off of AD now.

I just made the changes in Exchange for the group to have an email address. I am guessing the change has not replicated back to all my domain controllers and maybe Sharepoint did not sync with AD until now.

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it does take average 2 hours for send / manage permissions to take affect
mmcodefiveAuthor Commented:
No problem with configuration. Question was invalid since the problem fixed itself with time.
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